91.33% is the change from 427 to 817
Calculation steps:
[( 817 - 427 ) ÷ 427] x 100 = 91.33%
Formula
Percentage change = [(817 - 427) / 427] x 100
Subtract the new number by the original number
817 - 427 = 390
390 ÷ 427 = 0.9133489461358314
0.9133489461358314 x 100 = 91.33%